In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Coriolis wrote:

Sawmiller are you feeding the 2.5V + directly into the SX? If this is the case I am concerned you are not allowing enough margin for noise to provide a strong signal, the motor for the sawmill will generate a significant amount of noise which may interfere with the signal you are trying to measure. Since you are using a differential +/- 2.5V system, why not use an op amp in a unity inverter configuration with the negative RS485 terminal connected to the positive input of the op amp and the positive RS485 terminal connected to the negative op amp terminal, the output will be -((V+)-(V-))=-((-2.5)-(2.5))=5.0V.

Ask if you need a clarification on any of the jargon I used.

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